function highlightRows(){
	if(!document.getElementsByTagName) return false;
	var rows=document.getElementsByTagName('tr');
	for (var i = 0; i < rows.length; i++) {
		rows[i].onmouseover=function(){	
			this.style.fontWeight="bold";
		}
		rows[i].onmouseout=function(){
			this.style.fontWeight="normal";
		}
	}
}

addLoadEvent(highlightRows);